Gas-lamp.



Patented Mar. l3, I900.

No. 645,l42.

M'. P. STEVENS.

GAS LAMP.

(No Model.) (Apphcamn med mm. 4, 1898" 2 Sheets-Sheet l.

29 7 i 57. J. an 30 2 um I J5 1 i 11 I 1 .71. I

1 11mm 1 4. 8 W E I WITNESSES: I v INVENTOR Jim/A42 F 25;;

I v BYf 7 W, ATTORNEY Patented Mar. l3 I900. M. P. STEVENS.

G A S L A M P (Application filed Jan. 4, 1898.)

(No Model.) 2 Sheets-Sheet 2.

WITNESSES: INVENTORI 1 f, I I

r ATTORNEY 1 m: mmms Perms col. mum-urua, msmnm'on n c UNITED "STATES PATENT FFICE.

MERTON P. STEVENS, OF EAST ORANGE, NEW' JERSEY, ASSIGNOR TO THE SAFETY OAR HEATING AND LIGHTING COMPANY, OF NEW JERSEY.

GAS-LAM P.

SPECIFICATION forming part of Letters Patent No. 645,142, dated March 13, 1900. Application filed January 4, 1898. Serial No- 665 ,506 (N0 model.)

protecting the flame from all side and back drafts or other air-currents ten ding to prod uce a fluctuation of light.

The preferred form of lamp is illustrated in the accompanying two sheets of drawings, in which'- Figure 1 is a vertical central section, and Fig. 2 is a horizontal section taken on lines 2 2 of Fig. 1.

Throughout the drawings like reference-figures refer to like parts.

1 is a supporting-frame generally, which consists of the ring 1 and the spider l supported thereon.

2 2 are threaded sockets in the ring 1, in which supporting-arms may be screwed. One of thesesupporting-arms should be made hollow to form a pipe for the supply of gas when gas isto be burned in the lamp, all in accordance with the well-known construction as to such feature.

5 is any desirable form of burner supported on the burner-supports 3 and 4, one of which, 3, is hollow to connect with the hollow supporting-arm as a means of conducting the gas to the burner.

6 is the chimney, of glass or other translucent material, placed on the burner, which the chimney 6, preferably, as shown, at a point about three-fifths of the way from the bottom to the top of said chimney.

11 11 are holes in the reflector near the outer' per side of the reflector.

13 is a deflector of annular shape supported on the upper side ofthe ring 1 and extending down nearly to the junction of the shield and the reflector, so as to leave an annular passageway between the inner circumference of said deflector and the shield and the reflector, respectively.

14 14 represent flues, usually made of castiron tubes, mounted on the supporting-frame over the chimney and affording a passageway for the escape of the hot gases of combustion. I preferably make these flues. four in number and surround the cluster with a metal casing 15, which has air-inlets 16 16 in its upper portion outside of the inclosing globe of the lamp.

17 is a bolt or piece of threaded pipe, and 18 is a nut cooperating therewith to hold the fines down upon the supporting-frame.

19 is a supporting-ring for the casing 15.

20 is a ring attached to the casing 15 and having the-packing-ring 21 for holding the globe 9 down in position and forming anairtight joint for the same.

22 22 are air-passages left between the exterior of the flues 14 14 and the interior of the casing 15.

The operation of my invention is as follows: Gas being admitted through the hollow pipe 3 and ignited at the burner, the flame produces an upward draft of hot gas, which passes out of the flues 14 14. To supply the partial vacuum this produces in the bowl 8, air is drawn in through the inlets 16 16 and passes down into the passage-ways 22 22 in contact with the hot flues and thence into the space within the upper bowl 9. In passing through the space within the globe the air is forced by the deflector 13 to come in contact with the hot shield 12 and pass down upon the hot reflector 10. Passing along the upper side of said hot reflector the now thoroughlyheated airpasses down through the holes 11 11 into the lower bowl and to the flame.

The advantages of the construction described are the thorough heating of the air supplied to the burner, the steady flow of said What I claim as new, and desire to protect by Letters Patent, is-

1. In a lamp structure, the combination of a reflector, a gas-burner located below the reflector, an incandescent mantle located over said burner and projecting through the reflector, and a translucent shield surrounding the upper portion of the mantle.

2. In a lamp structure, the combination of a reflector, a gas-burner located below the reflector, an incandescent mantle located over said burner and projecting through the re flector, a chimney arranged over said burner and mantle and projecting through the reflector, and a translucent shield surrounding said chimney and extending from the top of the reflector to a point above the top of the chimney.

3. In a lamp structure, the combination of a reflector, a gas-burner located below the reflector, an incandescent mantle located over said burner and projecting through the reflector, a chimney arranged over said burner and mantle and projecting through the reflector, a translucent shield surrounding said chimney and extending from the top of the reflector to a point above the top-of the chimney, means for conveying the products of combustion from the lamp, and means for conveying highly-heated air to the interior of the lamp.

In testimony whereof I afflx my signature in the presence of two witnesses.

MERTON P. STEVENS. 

